count days between 2 dates

Hi, I am trying to make a form that will count the number of days between 2 dates and will exclude the public holidays and weekends from the counter.

here is my code wich works fine to exclude the weekends but does not cut the public holidays. (i added 03/01/2023 ad my holiday) 

var start = this.getField("start_date").value;
var end = this.getField("end_date").value;
var start = util.scand("dd/mm/yyyy H:MM:SS", start + " 0:00:01");
var end = util.scand("dd/mm/yyyy H:MM:SS", end + " 23:59:59");
var millisecondsPerDay = 86400 * 1000;
var holidayArray = [util.scand("dd/mm/yyyy H:MM:SS", "01/01/2023 0:00:01"),
util.scand("dd/mm/yyyy H:MM:SS", "03/01/2023 0:00:01"),
util.scand("dd/mm/yyyy H:MM:SS", "03/01/2023 23:59:59"),
util.scand("dd/mm/yyyy H:MM:SS", "30/12/2029 23:59:59")];
event.value = dateDifference(start, end, holidayArray);
function dateDifference(start, end, holidayArray) {
var startDate = new Date(+start);
var endDate = new Date(+end);
var diff = endDate - startDate;
var days = Math.round(diff / millisecondsPerDay);
var weeks = Math.floor(days / 7);
var days = days - (weeks * 2);
var startDay = start.getDay();
var endDay = end.getDay();
if (startDay - endDay > 1) {
days = days - 2;
}
if (startDay == 0 && endDay != 6) {
days = days - 1;
}
if (endDay == 6 && startDay != 0) {
days = days - 1;
}
for (var i = new Date(startDate); i <= endDate; i.setDate(i.getDate() + 1)) {
var currentDay = i.getDay();
if (currentDay == 0 || currentDay == 6) {
continue;
}
for (var j = 0; j < holidayArray.length; j++) {
var holiday = holidayArray[j];
if (i.getTime() === holiday.getTime()) {
days--;
break;
}
}
}
return days;
}

Could anyone help?